10 



Malaguti and Durocher ' determined the lime in the ash of a number 

 of wild plants growing on calcareous and noncalcerous soils and 

 obtained the results given in Table II. 



Table II. — Analyses by Malaguti and Durocher of wild plants from calcareous and 

 noncalcoreous soils. 



Kind of plints. 



Cruciferw (6 analyses) 



Lep:iiminos3R (6analyses)... 



Dipsacacejf (5 analyses) 



Saiicacc.T , Populus"f5 analy; 



Average 



Per cent. 

 35.79 

 ■SO. 26 

 .3S. 65 



Per cent. 

 20.12 

 28.12 

 20.63 

 51.16 



.30.01 



Li five species of plants the lime, soda, and potash m the ash were 

 also determined, as shown m Table III. 



Table III. — Analyses by Malaguti and Durocher of wild plants from calcareou.'! and 

 noncalcareous soils. 



RotJie ^ has analyzed the rupture-wort {Herniana glabr'a) from a 

 sihca sand and dolomite sand. The dolomite sand contained about 

 56 per cent CaCOj and 43 per cent MgCOj. The silica sand was made 

 up of quartz and feldspar. The plants from the two soils contained 

 about the same amount of crude ash, but the ash of the plant from 

 the dolomite sand differed from the ash of the check plant in con- 

 taining oue-tliird as much potash, twice as much Hme, three-fifths as 

 much iron, tliree times as much magnesia, one-twelfth as much silica, 

 and one-seventh as much potassium clilorid. The two samples were 

 taken from chfferent locahties and it is not stated whether the plants 

 were of the same age or not. 



I Malaguti and Durocher, Ami. Sei. Nat. Bot., 4. ser., 9 (1858), p. 222. 

 » Rothe, C, Ber. Naturhist. Ver. Augsburg, 1869, p. 145. 



